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Finding the Fourth Proportional to 808.08, 1,114.75 and 528.19

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Solution

The fourth proportional to 808.08, 1,114.75 and 528.19 is: 728.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    808.08 : 1,114.75 = 528.19 : x
  2. Step 2: Convert to fraction form
    808.08/1,114.75 = 528.19/x
  3. Step 3: Cross multiply
    808.08x = 1,114.75 × 528.19
  4. Step 4: Simplify right side
    808.08x = 588,799.80
  5. Step 5: Solve for x
    x = 588,799.80/808.08
  6. Step 6: Final answer
    x = 728.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.